Viconics VWZS Guide Specifications

Viconics Wireles Zoning System Engineering Guide

Specification

Viconics Wireless Zoning System Engineering Guide Spec

1.01 System Description – The Viconics Wireless Zoning System (VWZS) shall provide a simple and

efficient demand based system for the operation of changeover bypass or pressure dependent type
zoning systems utilizing standard 2 heat / 2 cool configurations, 2 heat / 2 cool with economizer and IAQ,
analog heat/2 cool, or heat pump 3 heat/ 2cool. The system shall consist of two primary components as
manufactured by Viconics: A communicating rooftop unit controller / heat pump controller (model
VZ7656x1000W) and one/several communicating zone controllers (model VZ7260x5x00W). The Viconics
profile of the ZigBee physical layer is used for data exchange of all required information between the zone
controllers and the rooftop unit controller for proper system operation. The system shall seamlessly
integrate into any 3rd party supervision system adding greater functionality without being limited to a
single vendor with the addition of a Viconics Wireless Gateway (if required). Zoning systems that require
a wired communication bus shall not be acceptable. All system configuration tools shall be embedded
within the local devices via real text configuration interface. Systems requiring external tools for
commissioning or configuration shall not be acceptable.

1.02 Quality Assurance - The control system shall be manufactured within a systems certified ISO-9001
and ISO-14001. Please see the Equipment section for industry approvals and specifications.

Part 2 – Equipment

2.01 General - The VZ7656x1000W Rooftop controller shall be designed for equipment control based on
heating and cooling demands from the zone controller(s) (VZ7260x5x00W). The packaged rooftop or
heat pump system controller VZ7656 shall also provide logic and required inputs/outputs to control

system specific static pressure. The VZ7260F5x00W zone controllers shall be designed for local pressure
dependent VAV control.

Communication Protocol – The control system shall communicate using the Viconics’ profile of the
ZigBee 2.4GHz with data rates up to 250 kbps. The protocol must support full handshaking for
information transmission reliability. The protocol must support automatic multiple topologies including star,
peer-to-peer and mesh.
A site survey using the VST5000W5000W wireless communicating site survey tools is recommended to
ensure proper communication and if required, the installation of VRP5000W5000W repeaters. Typical
communicating range including one separation (standard gypsum wall) is approximately 30 feet in
between controls. Typical communicating range direct line of sight can be up to 100 feet in between
controls.

Scalability – The system shall be fully scalable in terms of number of zone controllers and Rooftop Unit
controllers used on the same Personal Area Network (PAN ID).

The main network coordinator for the wireless the IEEE 802.15.4/ZigBee network can be either:

• The VZ7656x1000W RTU/HP controller for (SA) Stand-Alone applications: Where zoning
system(s) are self sufficient for communication and no external communication is required. In this
layout, the VZ7656x1000W RTU/HP controller shall act as the network coordinator.

• The Viconics Wireless Gateway (VWG / Jace-Driver for (NS) Networked Systems applications:
Where zoning system(s) (more than one can be installed in a typical building application) are required to
communicate with the Viconics VWG / Jace-Driver set. In this layout, the Viconics VWG / Jace-Driver acts
as the network coordinator. System shall support supervisory functionality (supplied by others) which will

support centralized scheduling, alarming and trending found commonplace amongst today’s advanced

automation systems.

Systems not capable of supporting supervisory BACnet workstations shall not be acceptable.

VZ7656x1000W Wireless Rooftop or Heat Pump Controller

The Rooftop unit Controller shall be:

VZ7656R1000W: Up to two heating and two cool stages, single fan speed output, 0-10Vdc output for

bypass damper or variable-frequency drive (VFD).
VZ7656F1000W: Modulating 0-10Vdc heating / 2 cooling stages, single fan speed output, 0-10Vdc output

for bypass damper or variable-frequency drive (VFD).
VZ7656E1000W: Up to two heating and two cooling stages, single fan speed output, 0-10Vdc output for

economizer actuator, 0-10Vdc output for bypass damper or variable frequency drive (VFD), indoor air
quality sequence (IAQ)

The Heat Pump Controller shall be:
VZ7656H1000W: 2 stage compressor with reversing valve and auxiliary heat, single fan speed output, 0-

10Vdc output for bypass damper or variable-frequency drive (VFD)

General VZ7656 Specifications:

VZ7656 controller shall be capable of controlling single or multistage HVAC units with automatic

changeover based on zone demands using the wireless Viconics’ profile of ZigBee wireless
communication.

The controller shall have the option of analyzing the PI heating or PI cooling demands from the

zones the following ways depending on the application:

1. Highest: The highest PI heating or PI cooling demand from the selected
voting zones shall dictate heating or cooling operation of the Rooftop Unit
controller.

2. Average of the three (3) highest demands: The average of the three (3)
highest PI heating or PI cooling demands from the selected voting zones will
dictate heating or cooling operation of the Rooftop Unit controller.

3. Average of the five (5) highest demands: The average of the five (5)
highest PI heating or PI cooling demands from the selected voting zones will
dictate heating or cooling operation of the Rooftop Unit controller.

The controller shall be capable of maintaining the system static pressure set point using

integrated proportional static pressure logic to modulate a bypass damper. A pressure transducer
with a 0-5Vdc output shall be wired directly to the VZ7656 controller. The controller shall have an
adjustable static pressure sensor range from 0-5” W.C. The control will output an analog signal
from 0-10Vdc to the bypass damper. A control system requiring a separate bypass damper
controller or separate sensors to display the bypass damper position is not acceptable.

The controller shall have EEPROM memory to prevent a loss of programming due to power

outage as well as a minimum of 6-hour reserve time for the internal clock.

The controller shall be capable of operating the packaged unit even if there is a loss of

communication with the zone controllers. The packaged unit will run in heating or cooling based
on the return air temperature. If there is no return air sensor installed, the controller shall